Casalvecchio (Arbërisht: Kazallveqi) is an Arbëreshëcomune and village in the Province of Foggia, Apulia, southern Italy. Mostly originating from a 15th-century migration of Albanians, the residents have subsisted by family farming. Of those native to the area for generations, many have continued to use the Arbëreshë language, even those of the post-World War 2 generation. The population in 2003 was 2,082.
In 1461 near Monte Gargano in the southeastern Apennine mountains a group of 5000 immigrants from Albania fled the enculturation of the Turks and Islam. They were sent by the great Albanian Skanderbeg, or Gjergj Kastrioti i Krujës, George Castriota. This part of Apulia was granted to the incomers by the king of Naples.